Hi uknosferat2,

If the fracture happens at the elbow resulting to the shortening of the humerus,
the medial head of the triceps which is inserted in the olecranon process of the ulna would be affected most which contributes to elbow extension restriction eps. in the terminal extension strength for weight-bearing. In this case, it is the shortening of the humerus that leads to the decreased ROM of the triceps....